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I
ifomenko1-Visitor
1-Visitor
February 11, 2020
Question

Symbolic calc is very slow (MC15)

  • February 11, 2020
  • 5 replies
  • 1952 views

Hi, I`m trying to get tangent stiffness matrix of 6 nodes triangular finite element. Beginning part of code contains symbolic calculation and very simple operations such as getting one element of vector or transpose are very very slow. So I can`t to continue.Thanks in advance for any advice. File is attached.

5 replies

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-MFra-21-Topaz II
21-Topaz II
February 11, 2020

Hi.

It is not slow for me.

At the beginning of the file - it is better to define the variables and constants in any way - and then reset them all - as shown below -

IFK answer.jpg

I
ifomenko1-VisitorAuthor
1-Visitor
February 11, 2020

It takes 20 sec to recalculate worksheet for N.nd=6

and what`s about you?

W
Werner_E25-Diamond I
25-Diamond I
February 11, 2020

You are calling B N.nd times just to pick out one of the six results and transpose it. Its sure more efficient to call B.n just once and work on the result.

This modification should do the job approx. N.nd times faster 😉

Werner_E_0-1581447331814.png

 

    I
    ifomenko1-VisitorAuthor
    1-Visitor
    February 11, 2020

    Many thanks my dear Werner, I`m so inattentive, I`m sorry.

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